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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Herschel-ATLAS: Statistical properties of Galactic cirrus in the GAMA-9 Hour Science Demonstration Phase Field
Monthly Notices of the Royal Astronomical Society, Volume 412, No. 2, Year 2011
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Description
We study the spectral energy distribution (SED) and the power spectrum of Galactic cirrus emission observed in the 14 deg2 Science Demonstration Phase field of the Herschel-ATLAS using Herschel and IRAS data from 100 to 500μm. We compare the Spectral and Photometric Imaging Receiver (SPIRE) 250, 350 and 500μm maps with IRAS 100-μm emission, binned in 6-arcmin pixels. We assume a modified blackbody SED with dust emissivity parameter β (F∝λ-β) and a single dust temperature Td, and find that the dust temperature and emissivity index varies over the science demonstration field as and 1 < β < 4. The latter values are somewhat higher than the range of β often quoted in the literature (1 < β < 2). We estimate the mean values of these parameters to be Td= 19.0 ± 2.4K and β= 1.4 ± 0.4. In regions of bright cirrus emission, we find that the dust has similar temperatures with , and similar values of β, ranging from 1.4 ± 0.5 to 1.9 ± 0.5. We show that Td and β associated with diffuse cirrus emission are anti-correlated and can be described by the relationship: β(Td) =NTαd with [N= 116 ± 38,α=-1.4 ± 0.1]. The strong correlation found in this analysis is not just limited to high-density clumps of cirrus emission as seen in previous studies, but is also seen in diffuse cirrus in low-density regions. To provide an independent measure of Td and β, we obtain the angular power spectrum of the cirrus emission in the IRAS and SPIRE maps, which is consistent with a power spectrum of the form P(k) =P0(k/k0)γ, where γ= 2.6 ± 0.2 for scales of 50-200arcmin in the SPIRE maps. The cirrus rms fluctuation amplitude at angular scales of 100arcmin is consistent with a modified blackbody SED with and β= 1.3 ± 0.2, in agreement with the values obtained above. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Authors & Co-Authors
Bracco, Andrea
United States, Irvine
University of California, Irvine
Cooray, Asantha Roshan
United States, Irvine
University of California, Irvine
United States, Pasadena
California Institute of Technology
Amblard, Alexandre
United States, Irvine
University of California, Irvine
Serra, Paolo
United States, Irvine
University of California, Irvine
Wardlow, Julie L.
United States, Irvine
University of California, Irvine
Thompson, Mark A.
United Kingdom, Hatfield
University of Hertfordshire
White, Glenn J.
United Kingdom, Milton Keynes
The Open University
United Kingdom, Didcot
Rutherford Appleton Laboratory
Auld, Robbie R.
United Kingdom, Cardiff
Cardiff University
Baes, Maarten
Belgium, Ghent
Universiteit Gent
Bertoldi, Frank
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Buttiglione, Sara
Germany, Bonn
Universität Bonn
Cava, Antonio
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Clements, David L.
United Kingdom, London
Imperial College London
Dariush, Aliakbar A.
United Kingdom, Cardiff
Cardiff University
de Zotti, Gianfranco
Germany, Bonn
Universität Bonn
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Dunne, Loretta
United Kingdom, Nottingham
University of Nottingham
Dye, S.
United Kingdom, Cardiff
Cardiff University
Eales, Stephen A.
United Kingdom, Cardiff
Cardiff University
Fritz, Jacopo
Belgium, Ghent
Universiteit Gent
Gomez, Haley L.
United Kingdom, Cardiff
Cardiff University
Hopwood, Rosalind H.B.
United Kingdom, Milton Keynes
The Open University
Ivison, Robert J.
United Kingdom, Edinburgh
Uk Astronomy Technology Centre
United Kingdom, Edinburgh
The University of Edinburgh
Jarvis, Matthew J.
United Kingdom, Hatfield
University of Hertfordshire
Lagache, Guilaine
France, Gif-sur-yvette
Université Paris-saclay
France, Paris
Cnrs Centre National de la Recherche Scientifique
Lee, Myunggyoon
South Korea, Seoul
Seoul National University
Leeuw, Lerothodi L.
United States, Mountain View
Seti Institute
Maddox, Steve J.
United Kingdom, Nottingham
University of Nottingham
Michałowski, Michał J.
United Kingdom, Edinburgh
The University of Edinburgh
Pearson, Christopher P.
United Kingdom, Milton Keynes
The Open University
United Kingdom, Didcot
Rutherford Appleton Laboratory
Pohlen, Michael
United Kingdom, Cardiff
Cardiff University
Rigby, Emma E.
United Kingdom, Nottingham
University of Nottingham
Rodighiero, Giulia
Italy, Padua
Università Degli Studi Di Padova
Smith, Daniel James B.
United Kingdom, Nottingham
University of Nottingham
Temi, Pasquale
United States, Moffett Field
Nasa Ames Research Center
Vaccari, Mattia
Italy, Padua
Università Degli Studi Di Padova
van der Werf, Paul P.
United Kingdom, Edinburgh
The University of Edinburgh
Netherlands, Leiden
Universiteit Leiden
Statistics
Citations: 41
Authors: 36
Affiliations: 22
Identifiers
Doi:
10.1111/j.1365-2966.2010.17971.x
ISSN:
00358711
Research Areas
Environmental